Role of Superficial Defects and Machining Depth in Tensile Properties of Electron Beam Melting (EBM) Made Inconel 718

Abstract Since there is no report on the influence of machining depth electron beam melting (EBM) parts, this paper investigated role superficial defects and in performance EBM made Inconel 718 (IN718) samples. Therefore, as-built samples were analyzed against shallow-machined (i.e., only removal outer surfaces) deep-machined deep surface into material) parts. It was shown that both had a drastically lower yield strength (970 ± 50 MPa), ultimate tensile stress (1200 40 ductility (28 2%) compared to This since premature failure occurred due various defects. The appeared two levels, as (1) notches pores (2) irregular cracks within subsurface. latter down 2 mm underneath surface, shallow exposed subsurface surfaces. Thus, parts achieved 68% 8% UTS elongation respectively. low be comparable which failed prematurely high fraction voids well